Phylum Mollusca Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Divasibranchia Minichev & Starobogatov, 1975
Order Stylommatophora Schmidt, 1855
see Infraorder Stylommatophora Schmidt, 1855
(Achatinid Sigmurethra)
Suborder Sigmurethra Pilsbry, 1900
see Group Sigmurethra Pilsbry, 1900
Superfamily Orthalicoidea Martens, 1860
Family Orthalicidae Martens, 1860
Subfamily Bulimulinae Tryon, 1867
Genus Drymaeus Albers, 1850
Subgenus Mesembrinus Albers, 1850